my girlfriends 98 old cutlass fuel,temp gauges quit working along w/radiator fans(i suppose the air cond. as well),the fog/driving lights?,highbeam instr.cluster indictator dosent showup,automatic headlights no longer work.headlights do work just no longer automaticly,all this happened at the same time,I have checked all fuses and relay'as well as grounds(as many as i could find)and have replaced the insrument cluster and BCM so far...i was told it could be passlock/ignition cyl. related but how to check it without buying needless new parts for no reason...THNX